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Messier 33 (Triangulum Galaxy)

Messier 33 (Triangulum Galaxy)


Bortle 7 skies
Nikon D5600 camera (unmodified)
ISO 200
Astro-Tech AT102ED refractor, 714mm focal length, f/7
HoTech 2" SCA field flattener (1X)
iOptron CEM26 mount
30s x 481 frames (4h 0.5m)


Siril 1.2.1:

Crop to 4800 x 3600px
BQ Octantis' procedure of white balance, background subtraction, and histogram conditioning
Background: modified asinh stretches (6x), background extraction, histogram adjustment, saturation
Stars: modified asinh stretch (5x), synthetic blue to reduce CA, saturation

RawTherapee 5.9:

L*a*b chrominance noise reduction
Luminance noise reduction

GIMP 2.10:

Luminance curve
Black point

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